Polis hing-wheel



e. N. BAOON. v

POLISHING WHEEL.

Patented Nov. 20, 1888.

& w 6 c 56 w W m w a M i A F v} z (No Model.)

ing to the size of the wheel required.

CHARLES N. BACON, OF ARLINGTON, MASSACHUSETTS.

POLlS HI NG-WHEEL.

SPECIFICATION forming part of Letters Patent No. 392,979, dated November 20, 1888.

Application filed February 17, 1888. Serial No. 264.400. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES N. BACON, a citizen of the United States, and a resident of Arlington, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Iolishing-WVheels, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in polishing-wheels for the purpose of polishing articles of metal; and it is carried out as follows, reference being bad to the accompanying drawings, wherein- Figure 1 represents a front view of the improved polishing-wheel, and Fig. 2 represents a rear view of the same. Fig. 3 represents a central longitudinal section of the improved wheel, and Fig. 4 represents a central longitudinal section of a modification of said polishing-wheel.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

a is an annular ring, made of felt or analogous material, which ring is preferably produced by cutting it or dieing it out from a sheet of felt of the desired thickness, accord- In combination with said felt ring a, I use a twopart or divided wooden hub, as shown in the drawings. Said hub is composed of a pair of cylindrical wooden disks, 1) and c, the exterior diameter of which is equal, or nearly so, to that of the interior diameter of the felt ring a, as shown.

Each wooden disk I) and c has on its outer face an annular flange or lip, as shown, respectively, at I) o in the drawings,which lips or flanges serve to prevent alateral expansion or bulging out of the flexible felt ring a when the polishing-wheel is in use. To the inner faces of the wooden disks 7) and c are glued or cemented,respectively, the sheets b and c, as shown in Fig. 3, which sheets are preferably made of cloth, paper, or other suitable textile or fibrous material, and the object of such sheets is to cover such inner faces of the hubs b a, so as to protect them against moistare in the atmosphere in which the wheel is used,and thus prevent the hubs from varying their shapes or sizes.

The hubs b c are preferably made each of a thickness a little less than half the thickness of the felt ring a, as shown in Fig. 3, so that said hubs b 0 may be driven firmly from 0pposite sides into the cylindrical central recess of said ring a without coming in contact with each other, by which arrangement I am able to-compress the interior portion of the ring a 6.; in a longitudinal direction when the hubs Z) c are driven into it, by which the interior portion of the ring a is made hard and firm, so as to rest securely on and against the wooden hubs b 0 without detracting from the yielding and flexible nature of the outer periphery or portion of the said ring a.

In driving the hubs b 0 into the ring at their flanges b c serve as stops to prevent said hubs from being driven in too far into said ring. If so desired, glue or other suitable adhesive substance may be applied to said hubs previous to driving them into the ring a, so as to secure them firmly to said felt ring. Iarrange the hubs b 0 relative to each other and to the ring a in such a manner that the fibers of one hub shall cross or be at a right angle to the fibers in the opposite hub, as shown in Figs.

1 and 2, by which arrangement the wheel is prevented from getting out of true by the warping or twisting of the wood fibers.

WVhen so desired,I may arrange the hubs b c in the manner shown in Fig. et-that is, to

cover the inner face of one hub only with the sheet band make the said hubs of such a 8 thickness that when driven into the ring a the inner face of the hub 0 will be brought in contact with the sheet or packing b of the opposite one, as shown in said Fig. 4; and I prefer in this case to coat the packing Z), or the in- 0 ner face of the hub c,with glue or suitable adhesive substance, so as to unite the wooden hubs b 0 together at their meeting surfaces, with the packing 1) between them, as shown in said Fig. 4. Central perforations, b c", are made in the respective hubs b c, for the reception of the rotary spindle on which the wheel is to be used.

Having thus fully described the nature,con- In testimony whereof I have signed my name IO struction, and operation of my invention, I to this specification,in the presence of two sub: wish to secure by Letters Patent, and c1aim scribing witnesses, on this'3d day of February,

The felt ring a, in combination with the A. D. 1888. 5 hubs b c,inserted into said ring from opposite sides thereof, and having the respective an- CHARLES BACON nular flanges b c, as described, and the inter- Witnesses: nal coverings or packings, b c, as and for the ALBAN ANDREN,

purpose set forth.

' HENRY CHADBOURN. 

